The ESDNH04R21 from Hunan Jingxin Microelectronics is a MOSFET with Continous Drain Current 25 to 32 A, Drain Source Resistance 15 to 29 milli-ohm, Drain Source Breakdown Voltage 45 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.0 to 1.8 V. Tags: Surface Mount. More details for ESDNH04R21 can be seen below.